The Golden Calf

But those who do wrong and then repent and believe, your Lord is Forgiving, Merciful.

2:54And when Moses said unto his people: O my people! Ye have wronged yourselves by your choosing of the calf (for worship) so turn in penitence to your Creator, and kill (the guilty) yourselves. That will be best for you with your Creator and He will relent toward you. Lo! He is the Relenting, the Merciful.

7:153But those who do ill-deeds and afterward repent and believe - lo! for them, afterward, Allah is Forgiving, Merciful.